Reflex-ported folded horn enclosure
OwnerDana A. Mooreinventor
Life of this patent
Estimating the term…
Abstract
A low frequency exponential/hyperbolic hybrid folded horn enclosure intended for use in proximity with at least one planar surface, such as a floor, ceiling, or wall, with access to the horn throat from the top of the enclosure. The horn is bifurcated at the throat and folds horizontally around a central trapezoid-shaped vertical back chamber which is reflex ported for enhanced low frequency response below the frequency cutoff of the horn. The back chamber outer sides define part of the horn channel, resulting in a relatively simple structure with a small footprint and no void internal space. The throat exponential expansion cross-sectional area is consistently maintained while the proportions of the throat channels are elongated to the height of the enclosure.
Claims20
In a horn type loudspeaker for operation in a low frequency range,
- a cabinet comprised of two back panels abutted together at the proximate sides with each panel arranged in an opposite forwardly increasing angle from the abutment at the rearward plane,
- an inner panel spaced forwardly of said two rear panels and having a vertically oriented throat opening therein,
- two inner side panels engaged with the outside edges of said inner panel, converging forwardly of said inner panel to engage at each side of a frontally arranged panel, wherein said converging angles partially define flaring horn sections on either side of the central vertically-oriented air chamber formed therewith,
- a phase inverting means of said air chamber arranged in said front panel,
- two outer side panels engaged with the outside edges of said rear panels, spaced from said inner side panels in oppositely disposed spaced planes to form the flaring portions of the terminal horn sections therewith,
- baffles cooperating with said throat opening and said rear panels to create an equal division of the air column rearward of said throat opening, forming two horizontal horn sections flaring in opposite directions from said throat opening to said terminal horn sections,
- means for completing said horn sections, and
- an apertured panel for enabling the sealed engagement of at least one driving unit, mounted forwardly of said throat opening and cooperating therewith, to transmit sound though said throat opening and said horn sections therebeyond.
In a horn loudspeaker intended for operation in proximity to at least one planar surface,
- a plurality of baffles in relation to form a substantially trapezoidal air chamber,
- a first aperture in one of said baffles, said baffle being arranged rearwardly, with said aperture being adapted to be closed by at least one driving unit,
- a second aperture in one of said baffles, said baffle being oppositely and frontally arranged from said first apertured baffle, with said second aperture communicating with a tuned column of air located in said air chamber and arranged to propagate sound waves frontally,
- a second plurality of baffles defining an air column, which expands at an exponential rate from said aperture and which folds sideways around said air chamber at a hyperbolic rate, and
- further baffles forming a closure for said air column and said first aperture, completing said air column and said air chamber therewith.
A horn loudspeaker comprising a trapezoid-shaped columnar air chamber defined by baffles,
- one of said baffles being apertured and adapted to support at least one driving unit in operating relation to said aperture,
- additional baffles defining an expanding air column from said aperture and arranged to fold said air column horizontally around said air chamber in opposite directions and further folding said column in a substantially unified direction, wherein two vertical baffles complete the sides of the terminal section of said air column,
- a top panel, adapted and apertured so as to define a passage to the interior of said air chamber,
- a bottom panel, and
- a removable access panel, adapted and arranged so as to seal said air chamber from the atmosphere.
Dependencies are inferred from the claim text.